license: other
dataset_info:
features:
- name: id
dtype: string
- name: task
dtype: string
- name: text
dtype: string
splits:
- name: train
num_bytes: 1223425889
num_examples: 1207998
download_size: 294631286
dataset_size: 1223425889
configs:
- config_name: default
data_files:
- split: train
path: data/train-*
synth-llava
Reverse-direction augment (v5) of the synth_llava / synth_llava2
(image+caption) training text -- 1,207,998 rows (603,999 source rows x 2
tasks). Replaces this repo's prior single-task release (v4,
instruction-phrasing-pool augment) -- the old content isn't used by
anything going forward. <seed2_N> payload tokens for the forward task are
byte-identical to the prior release; the reverse task is new.
Why this exists
Every prior release only trained image->caption (forward). Huu's own Discord stance (2026-08-03), in response to a "isn't caption->seed2 counter-intuitive?" question: "seed2 is bidirectional" -- the tokenizer's own design intent already includes text->image conditioning (its reconstruction path is a diffusion model, SD2.1-unclip, conditioned on the seed2 sequence), not just image understanding. Considered and initially set aside earlier in the same investigation for lacking a cheap, verifiable round-trip (unlike cosmos/avclm/SNAC/agent, which have real decoders) -- but that's a property of evaluation, not a reason to skip training on it (the same logic applies to any text-to-image diffusion model).
What changed
Tokens are unchanged -- reuses the already-encoded <seed2_N> sequence
from the prior release with no re-tokenization. Adds one new task per
source row:
- forward (unchanged, byte-identical to v4):
<seed2>...</seed2>+ one of 7 instruction phrasings -><caption>...</caption> - reverse (NEW): one of 7 "draw/imagine/visualize" instruction
phrasings +
<caption>...</caption>-><seed2>...</seed2>. Instruction variant assigned deterministically per row (sha256(id + "_reverse") % 7).
Format
[forward]
USER: <seed2> <seed2_N> ... </seed2> <one of 7 instruction phrasings> ASSISTANT:
<think>
</think>
<caption> ... </caption>
[reverse]
USER: <one of 7 draw/imagine phrasings> <caption> ... </caption> ASSISTANT:
<think>
</think>
<seed2> <seed2_N> ... </seed2>
Base
Synthetic image+caption pairs from
mixture-vitae-backup/MixtureVitae-Backup,
tokenized with the Seed2 semantic image tokenizer (<seed2_N>, vocab 8192)
-- the only tokenizer in this project that accepts a standalone image with
no video/action context.